Fliptroniks Samsung Galaxy S4 6200mAh Extended Battery + Black Back Matte Finish Cover (Compatible with AT&T I337, Verizon I545, Sprint L720, T-Mobile M919, International I9500 & I9505) - NFC Enabled Package contents: 1 Fliptroniks 6200mah Extended Battery for Galaxy S4 + 1 Matte Finish Back Cover Increased battery life for browsing the internet and increased talk time Fliptroniks batteries have an integrated microchip to prevent overcharging and overheating that helps lengthen the life of your battery Grade A cells ensure longer battery life (500+ cycles) and high-speed, efficient charging. Compatible with All Samsung Galaxy S4 Models